Allow the renderer process to map textures from one context into another.

content/common/gpu/gpu_command_buffer_stub.h

 // Copyright (c) 2011 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef CONTENT_COMMON_GPU_GPU_COMMAND_BUFFER_STUB_H_
 #define CONTENT_COMMON_GPU_GPU_COMMAND_BUFFER_STUB_H_
 #pragma once
 
 #if defined(ENABLE_GPU)
 
 #include <queue>
 #include <string>
 #include <vector>
 
 #include "base/memory/weak_ptr.h"
 #include "base/process.h"
 #include "base/task.h"
 #include "content/common/gpu/media/gpu_video_decode_accelerator.h"
+#include "gpu/command_buffer/common/constants.h"
 #include "gpu/command_buffer/service/command_buffer_service.h"
 #include "gpu/command_buffer/service/gpu_scheduler.h"
 #include "ipc/ipc_channel.h"
 #include "ipc/ipc_message.h"
 #include "ui/gfx/native_widget_types.h"
 #include "ui/gfx/size.h"
 
 class GpuChannel;
 class GpuWatchdog;
 
@@ skipping 55 matching lines @@
 #endif  // defined(OS_MACOSX)
 
  private:
   // Cleans up and sends reply if OnInitialize failed.
   void OnInitializeFailed(IPC::Message* reply_message);
 
   // Message handlers:
   void OnInitialize(base::SharedMemoryHandle ring_buffer,
                     int32 size,
                     IPC::Message* reply_message);
+  void OnMapExternalResource(gpu::resource_type::ResourceType resource_type,
+                             uint32 resource_source_id,
+                             int32 source_route_id,
+                             uint32 resource_dest_id);
   void OnSetParent(int32 parent_route_id,
                    uint32 parent_texture_id,
                    IPC::Message* reply_message);
   void OnGetState(IPC::Message* reply_message);
   void OnFlush(int32 put_offset,
                int32 last_known_get,
                uint32 flush_count,
                IPC::Message* reply_message);
   void OnAsyncFlush(int32 put_offset, uint32 flush_count);
   void OnRescheduled();
@@ skipping 55 matching lines @@
 
   // The video decoder associated with this stub, if any.
   scoped_ptr<GpuVideoDecodeAccelerator> video_decoder_;
 
   DISALLOW_COPY_AND_ASSIGN(GpuCommandBufferStub);
 };
 
 #endif  // defined(ENABLE_GPU)
 
 #endif  // CONTENT_COMMON_GPU_GPU_COMMAND_BUFFER_STUB_H_